White streaks on the legs may be triggered by atrophic lines, lichen planus and other diseases. 1. Atrophic striae: Atrophic striae are mostly seen in adolescents with dramatic increase in weight or height, pregnant women, obese people, or in patients who use glucocorticoids or suffer from Cushing’s syndrome. The patient’s skin will appear red, pale white stripes, commonly found on the thighs, waist and abdomen. 2. Lichen planus: The cause of this disease is not yet clear, and it is considered to be related to immunity, infection, genetics, neuropsychiatric factors, etc. The patient’s skin will appear purplish red and flat. The patient’s skin will appear purplish-red flat papules, white net-like stripes, etc., preferably in the limbs and other places. The cause of white streaks on the legs is not the same, it is recommended that the patient go to a regular hospital to clarify the cause of the disease.